//获得coolie 的值

function cookie(name) {

	var cookieArray = document.cookie.split("; "); // 得到分割的cookie名值对

	for (var i = 0; i < cookieArray.length; i++) {

		var arr = cookieArray[i].split("="); // 将名和值分开

		if (arr[0] == name)
			return unescape(arr[1]); // 如果是指定的cookie，则返回它的值

	}

	return "";

}

/*
 * function delCookie(name)//删除cookie
 *  {
 * 
 * document.cookie = name+"=;expires="+(new Date(0)).toGMTString();
 *  }
 */

function getCookie(objName) {// 获取指定名称的cookie的值

	var arrStr = document.cookie.split("; ");

	for (var i = 0; i < arrStr.length; i++) {

		var temp = arrStr[i].split("=");

		if (temp[0] == objName)
			return unescape(temp[1]);

	}

}

function addCookie(objName, objValue, objHours) { // 添加cookie

	var str = objName + "=" + escape(objValue);

	if (objHours > 0) { // 为时不设定过期时间，浏览器关闭时cookie自动消失

		var date = new Date();

		var ms = objHours * 3600 * 1000;

		date.setTime(date.getTime() + ms);

		str += "; expires=" + date.toGMTString();

	}

	document.cookie = str;

}

function setCookie(name, value)// 两个参数，一个是cookie的名子，一个是值

{

	var Days = 30; // 此 cookie 将被保存 30 天

	var exp = new Date(); // new Date("December 31, 9998");

	exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);

	document.cookie = name + "=" + escape(value) + ";expires="
			+ exp.toGMTString();

}

function getCookie(name)// 取cookies函数

{

	var arr = document.cookie
			.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));

	if (arr != null)
		return unescape(arr[2]);
	return null;

}

function delCookie(name)// 删除cookie
{
	var exp = new Date();
	exp.setTime(exp.getTime() - 1);
	var cval = getCookie(name);
	if (cval != null) {
		document.cookie = name + "=" + cval;
	}
}
